Benthophilus leptocephalus is a deepwater species of goby widespread along the central Caspian Sea from the mouth of the Samur River to Türkmenbaşy and Hasan-Kuli.Boldyrev V.S., Bogutskaya N.G. (2007) Revision of the tadpole-gobie of the genus Benthophilus (Teleostei: Gobiidae). Ichthyol. Explor. Freshwaters, 18(1): 31-96. This species can reach a length of TL.
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